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Finding the Fourth Proportional to 21,203.95, 31,820.50 and 7,352.95

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Solution

The fourth proportional to 21,203.95, 31,820.50 and 7,352.95 is: 11,034.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,203.95 : 31,820.50 = 7,352.95 : x
  2. Step 2: Convert to fraction form
    21,203.95/31,820.50 = 7,352.95/x
  3. Step 3: Cross multiply
    21,203.95x = 31,820.50 × 7,352.95
  4. Step 4: Simplify right side
    21,203.95x = 233,974,545.48
  5. Step 5: Solve for x
    x = 233,974,545.48/21,203.95
  6. Step 6: Final answer
    x = 11,034.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.